root/branches/0.9/models/ClientModel.php

<?php
class ClientModel extends Doctrine_Record
{
        public function setTableDefinition() 
    {
                $this->setTableName('clients');

                $this->hasColumn('id', 'integer', 4, array('notnull' => true,
                                                   'primary' => true,
                                                   'autoincrement' => true,
                                                   'unsigned' => true));
                $this->hasColumn('short_name', 'string', 32, array('notnull' => true, 'notblank', 'unique' => true));
        }

        public function setUp() 
    {
                $this->hasMany('AddressModel', array('local' => 'client_id', 'foreign' => 'address_id', 'refClass' => 'ClientToAddressModel'));
        }
}

class ClientToAddressModel extends Doctrine_Record 
{
        public function setTableDefinition() 
    {
                $this->setTableName('clients_to_addresses');

                $this->hasColumn('client_id', 'integer', 11, array('primary' => true));
                $this->hasColumn('address_id', 'integer', 11, array('primary' => true));
        }

        public function construct()
    {
        }

        public function setUp() 
    {
        $this->hasOne('ClientModel', array('local' => 'client_id', 'foreign' => 'id', 'onDelete' => 'CASCADE'));
        $this->hasOne('AddressModel', array('local' => 'address_id', 'foreign' => 'id', 'onDelete' => 'CASCADE'));
        }
}

class AddressModel extends Doctrine_Record 
{
        public function setTableDefinition() 
    {
                $this->setTableName('addresses');

                $this->hasColumn('id', 'integer', 11, array('autoincrement' => true,
                                                                                                        'primary'       => true
                                                                                                        ));
                $this->hasColumn('address1', 'string', 255, array('notnull' => true, 'notblank'));
                $this->hasColumn('address2', 'string', 255, array('notnull' => true));
                $this->hasColumn('city', 'string', 255, array('notnull' => true, 'notblank'));
                $this->hasColumn('state', 'string', 10, array('notnull' => true, 'notblank', 'usstate'));
                $this->hasColumn('zip', 'string', 15, array('notnull' => true, 'notblank', 'regexp' => '/^[0-9-]*$/'));
        }

        public function setUp() 
    {
                $this->hasMany('ClientModel', array('local' => 'address_id', 'foreign' => 'client_id', 'refClass' => 'ClientToAddressModel'));
        }
}